Daikin CTXS15K2V1B User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Indoor Unit
Inverter
Wall Mounted Type
1.5/2.0/2.5/3.5 kW Class
Si041258EA

Service Manual
Removal Procedure
Indoor Unit
zHeat Pump
CTXS15K2V1B
CTXS35K2V1B
FTXM20K3V1B
FTXM25K3V1B
FTXS20K2V1B
FTXS25K2V1B

Si041258EA
Removal Procedure 1
Table of Contents
1. Air Filters .................................................................................................2
2. Horizontal Blade......................................................................................3
3. Front Panel..............................................................................................4
4. Front Grille ..............................................................................................5
5. Vertical Blade ASSYs..............................................................................6
6. Electrical Box ..........................................................................................7
7. Swing Motor / PCBs ................................................................................9
8. Indoor Heat Exchanger .........................................................................13
9. Fan Rotor / Fan Motor...........................................................................16
Note: The illustrations may be slightly different depending on the model.

Air Filters Si041258EA
2Removal Procedure
1. Air Filters
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1. Remove the air filters. The air filter is not marked
for difference between the
right and left sides.
The air filter can be set
easily by inserting it along
the guides.
1Open the front panel.
2Pull out the air filter
downward and remove
it.
3Remove the other air
filter in the same way.
Insert the air filter with the
“FRONT” mark faced up.
Be sure to insert the hooks
(at 2 lower positions) when
mounting the air filter.
2. Remove the Titanium
apatite photocatalytic
air-purifying filters.
1Remove the Titanium
apatite photocatalytic
air-purifying filter ASSY
by unfastening the 2
projections from the
back of the air filter.
2Remove the Titanium
apatite photocatalytic
air-purifying filter from
its frame (at 5 positions)
by bending it.
To prevent the damage, do
not remove the Titanium
apatite photocatalytic air-
purifying filter from the frame
when cleaning it.
The right and left filters are
interchangeable.
Hook
Front panel
Air filter
(R18155)
Projection
(R18156)
Titanium apatite
photocatalytic
air-purifying filter
Air filter
(back side)
Hook
(R8027)

Si041258EA Horizontal Blade
Removal Procedure 3
2. Horizontal Blade
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1Open the horizontal
blade.
The center shaft can be
released easily by bending
the blade.
2Unfasten the center
shaft while bending the
horizontal blade
slightly.
Installation procedure
1. Since the key pattern hook
is provided, rotate the blade
and fit it to the right shaft
first.
2. Fit the blade to the center
and left shafts.
3Unfasten the left shaft.
4Unfasten the right shaft.
5Remove the horizontal
blade.
Horizontal blade
(R18157)
(R16661)
Shaft
(R16662)
Key pattern hook
Left Right
Shaft
(R16663)

Front Panel Si041258EA
4Removal Procedure
3. Front Panel
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1Open the front panel
over the position where
it stops.
2Release the right rotary
shaft.
The rotary shaft on each
side can be released easily
by sliding each shaft inward.
3Release the left rotary
shaft.
4Remove the front panel. When reassembling the
front panel, fit the right and
left rotary shafts one by one
into the grooves and fully
push them in position.
Left side
Front panel
Right side
(R16664)
Right
(R16665)
Rotary shaft
(R16666)
Left Rotary shaft
Rotary shaft
(R16667)

Si041258EA Front Grille
Removal Procedure 5
4. Front Grille
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1Remove the 2 screws.
2Unfasten the 3 hooks at
the top.
3Pull the upper part of
the front grille out and
lift the lower part up,
and then remove the
front grille.
The convex marks (...) on
the front panel indicate the
position of the hooks.
When reassembling, make
sure that all the 3 hooks are
fastened.
(R16668)
(R18158)
Hook
Front grille
(R12715)

Vertical Blade ASSYs Si041258EA
6Removal Procedure
5. Vertical Blade ASSYs
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1Unfasten the right and
left hooks of the fan
guard with pliers.
Narrow the edges of the
hook to unfasten it.
2Unfasten the 4 hooks at
the bottom. Remove the
fan guard.
Remove the other fan guard
in the same way.
3Unfasten the hooks of
the vertical blade ASSY
at the upper 2 positions.
A vertical blade ASSY has 6
fins. It is impossible to
replace only one fin.
The vertical blade ASSY is
not marked for difference
between right and left.
4Unfasten the 3 hooks at
the shaft mounting part
by pressing them with a
flat screwdriver.
Remove the other vertical
blade ASSY in the same
way.
5Remove the vertical
blade ASSY.
Hook
Fan guard
Hook
(R14608)
(R11646)
Hook
(R11647)
Hook
(R18159)
Hook
Vertical blade ASSY
(R8022)
Hook

Si041258EA Electrical Box
Removal Procedure 7
6. Electrical Box
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1. Disconnect the connecting
wires.
1Remove the screw and
remove the service
cover.
2Remove the screw of
the wire fixture.
3Remove the screws of
the terminal board and
disconnect the
connecting wires.
4Pull out the indoor heat
exchanger thermistor.
Take care not to lose the clip
of thermistor.
(R18160)
Service cover
(R18237)
Wire
fixture
Connecting
wires
Terminal board
(R12045)
Indoor heat exchanger thermistor
Clip
(R11268)
Thermistor

Electrical Box Si041258EA
8Removal Procedure
2. Remove the electrical box.
1Remove the screw and
release the earth /
ground wire.
2
3
Disconnect the
connector [S200].
Release the fan motor
harnesses from the
hook.
[S200]: fan motor
4Remove the screw of
the electrical box.
When reassembling, catch
the hook at the back of the
electrical box.
5Slide the electrical box
to the right first and
detach the horizontal
blade from the electrical
box.
6Pull out the electrical
box.
Step Procedure Points
Screw
Earth /
ground
wire
(R18956)
(R15844)
[S200]
(R16649)
Hook
(R18162)
(R18163)
Hook
Bottom frame

Si041258EA Swing Motor / PCBs
Removal Procedure 9
7. Swing Motor / PCBs
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1. Remove the swing motor.
1Remove the screw of
the swing motor.
2Unfasten the hook and
disconnect the
connector.
The connector of the swing
motor has a hook.
Press the hook with a flat
screwdriver to unfasten it.
2. Remove the PCBs.
1Unfasten the hooks at
the upper 2 positions of
the shield plate (2).
2Unfasten the hook at
the lower position,
and remove the shield
plate (2).
Swing motor
(R11650)
(R8037)
(R14847)
(R14603)
Hook
Shield plate (2)
Electrical box
Hook
(R16650)

Swing Motor / PCBs Si041258EA
10 Removal Procedure
3Unfasten the hook, and
release the display PCB
ASSY.
4Remove the
INTELLIGENT EYE
fixing plate by twisting
it.
5Unfasten the 3 hooks
and remove the
INTELLIGENT EYE
sensor PCB.
6Disconnect the
connector [S36] from
the INTELLIGENT EYE
sensor PCB.
Step Procedure Points
(R16674)
Display PCB ASSY
Hook
(R16675)
INTELLIGENT
EYE fixing plate
(R16652)
(R16676)
[S36]

Si041258EA Swing Motor / PCBs
Removal Procedure 11
7Turn over the display
PCB ASSY, and
unfasten the 3 hooks to
remove the display
PCB.
8Disconnect the
connector [S27] from
the display PCB.
[S27]: control PCB
9Unfasten the 2 hooks of
the shield plate (1).
10 Remove the shield
plate (1).
Step Procedure Points
(R18164)
Display PCB
(rear side)
Hook
Hook
(R18165)
[S27]
(R12061)
Hook
Shield plate (1)

Swing Motor / PCBs Si041258EA
12 Removal Procedure
11 Release the harnesses
from the 4 hooks.
12 Disconnect the
terminals from the
terminal board.
1 : black (front)
2 : white (back)
3 : red (front)
: green/yellow (front)
green (back)
13
14
Unfasten the 4 hooks of
the control PCB.
Remove the control
PCB.
Step Procedure Points
(R12062)
Hook
(R14609)
(R18277)
Hook
Hook
Control
PCB

Si041258EA Indoor Heat Exchanger
Removal Procedure 13
8. Indoor Heat Exchanger
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
In pump-down work, be sure to stop the compressor before disconnecting the
refrigerant pipe. If the refrigerant pipe is disconnected with the compressor operating
and the stop valve open, air may be sucked in and may generate an over-pressure in
refrigeration cycle, thus resulting in pipe rupture or accidental injury.
When removing or reinstalling the indoor heat exchanger, be sure to wear gloves or
wrap the indoor heat exchanger with cloths. (You may be injured by the fins.)
Caution Be sure to conduct pump down operation before disassembling the refrigerant pipe.
If the refrigerant leaks, repair the spot of leaking, then collect all refrigerant from the
unit. After conducting vacuum drying, recharge proper amount of refrigerant.
From the viewpoint of global environmental protection, make sure to use a vacuum
pump for air purging.
Step Procedure Points
1. Disconnect the refrigerant
piping.
1Remove the 2 screws.
2Pull out the drain hose. Hold the indoor unit up with
a piece of wood.
Place a plastic sheet under
the drain pan to prevent
from wetting the floor with
remaining drain.
If the drain hose is
embedded in the wall,
disconnect the drain hose
beforehand.
Carry out the removal works
with 2 wrenches.
When the pipings are
disconnected, protect both
the openings of pipe and
unit from entering of
moisture.
3Unscrew the flare nut
for gas piping and liquid
piping and disconnect
them.
(R12174)
Drain hose
Extension drain hose
Connecting wires
(R18278)
(R12177)

Indoor Heat Exchanger Si041258EA
14 Removal Procedure
2. Remove the indoor heat
exchanger.
1Remove the indoor unit
from the installation
plate.
2Unfasten the hook of
the piping fixture on the
back of the indoor unit.
3Slightly widen the
auxiliary piping.
4Remove the screw on
the left side and
unfasten the hook on
the rear side.
Step Procedure Points
(R17289)
Piping fixture
(R18166)
Auxiliary piping
(R8040)
(R11269)
Hook
Screw
(R17336)
Hook

Si041258EA Indoor Heat Exchanger
Removal Procedure 15
5Push and unfasten the
hook on the right side
and lift up the indoor
heat exchanger.
6Pull the indoor heat
exchanger to the front
side to unfasten the
hooks completely, and
then remove it.
Step Procedure Points
Hook
(R8042)
(R8043)
Indoor heat
exchanger

Fan Rotor / Fan Motor Si041258EA
16 Removal Procedure
9. Fan Rotor / Fan Motor
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1Remove the screw of
the right side panel.
2Unfasten the hook of
the right side panel.
3Remove the right side
panel.
4The fan motor has 3
projections on the right
side.
The fan rotor has a
rotating shaft on the left
side.
5Remove the fan rotor.
Right side panel
(R8044)
Hook (R18280)
Fan rotor
Fan motor
(R8047)
(R8048)

Si041258EA Fan Rotor / Fan Motor
Removal Procedure 17
6Press the bearing from
outside and remove the
bearing.
7Unfasten the 2 hooks of
the motor cover.
8Pull out the fan motor
from the fan rotor to
remove.
The magnet of the fan motor
is united with the fan rotor.
Be careful not to attract
metal waste to the magnet.
Keep away from the
materials that can be
affected by magnetic force
also.
Step Procedure Points
(R18167)
Bearing
(R8051)
Hook
Motor cover
Magnet Coil
Fan motor
(R8052)
(R21825)

Revision History
Month / Year Version Revised contents
04 / 2013 Si041258 First edition
04 / 2015 Si041258EA Model addition: FTXM20/25K3V1B